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Finding the Fourth Proportional to 667,376.32, 921,144.12 and 381,062.48

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Solution

The fourth proportional to 667,376.32, 921,144.12 and 381,062.48 is: 525,960.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,376.32 : 921,144.12 = 381,062.48 : x
  2. Step 2: Convert to fraction form
    667,376.32/921,144.12 = 381,062.48/x
  3. Step 3: Cross multiply
    667,376.32x = 921,144.12 × 381,062.48
  4. Step 4: Simplify right side
    667,376.32x = 351,013,462,804.62
  5. Step 5: Solve for x
    x = 351,013,462,804.62/667,376.32
  6. Step 6: Final answer
    x = 525,960.32

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.